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vomiting
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vomiting

pathology
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Also known as: emesis
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Also called:
emesis

vomiting, the forcible ejection of stomach contents from the mouth. Like nausea, vomiting may have a wide range of causes, including motion sickness, the use of certain drugs, intestinal obstruction, disease or disorder of the inner ear, injury to the head, and appendicitis. It may even occur without nausea, such as after extreme physical exertion. Vomiting is believed to be controlled by two distinct brain centres—the vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata. The vomiting centre initiates and controls the act of emesis, which involves a series of contractions of the smooth muscles lining the ...(100 of 221 words)

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